Company Overview
About Heirloom Carbon
Heirloom Carbon is one of the only direct air capture (DAC) companies to cross from pilot scale to actual commercial operation in 2026, with its first facility in Shreveport, Louisiana going operational this year. The company has secured $475 million in committed investment for two Louisiana plants: a 17,000-tonne-per-year facility now operational and a 100,000-tonne-per-year facility under development — representing the largest DAC buildout in North America.
Business Model & Competitive Advantage
Heirloom's differentiation is its low-energy limestone-based mineralization process: the company spreads limestone powder on trays that passively absorb atmospheric CO2, then heats the limestone to release concentrated CO2 for permanent geological storage. This approach requires significantly less electricity than liquid solvent or solid sorbent DAC systems, making it more cost-competitive at scale. Heirloom is a partner in the DOE's Project Cypress DAC Hub in Louisiana, providing government co-funding and technical validation.
Competitive Landscape 2025–2026
The permanent geological storage of captured CO2 is provided through partnership with CapturePoint's Class VI injection wells — creating a complete carbon removal chain from atmosphere to permanent underground storage. Microsoft, Stripe, and other early carbon removal buyers have purchased Heirloom credits, demonstrating corporate demand for permanent, verifiable carbon removal at a price point that is declining as operations scale.
Open Positions
Reddit Discussions
Key Differentiators
Strong Challenger
Heirloom Carbon is an established challenger with significant market presence and competitive offerings in Climate Tech.
Growth Stage
Heirloom Carbon has achieved $475M in revenue, demonstrating strong product-market fit.
Frequently Asked Questions
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